高级搜索

流化床中煤与稻秆混烧污染物排放特性

,  , 

downloadPDF

上一篇

下一篇

谢兴旺, 仲兆平, 薛则禹. 流化床中煤与稻秆混烧污染物排放特性[J]. 环境工程学报, 2018, 12(9): 2572-2579. doi: 10.12030/j.cjee.201804004
引用本文: 谢兴旺, 仲兆平, 薛则禹. 流化床中煤与稻秆混烧污染物排放特性[J]. 环境工程学报, 2018, 12(9): 2572-2579. doi: 10.12030/j.cjee.201804004
shu
XIE Xingwang, ZHONG Zhaoping, XUE Zeyu. Characteristics of pollutant emissions from co-combustion of straw and coal in fluidized bed[J]. Chinese Journal of Environmental Engineering, 2018, 12(9): 2572-2579. doi: 10.12030/j.cjee.201804004
Citation: XIE Xingwang, ZHONG Zhaoping, XUE Zeyu. Characteristics of pollutant emissions from co-combustion of straw and coal in fluidized bed[J]. Chinese Journal of Environmental Engineering, 2018, 12(9): 2572-2579. doi: 10.12030/j.cjee.201804004
shu

流化床中煤与稻秆混烧污染物排放特性

  • 1.

    东南大学能源与环境学院，南京 210096

  • 基金项目:

    国家自然科学基金资助项目（51276040，U1361115）

    国家重点基础研究发展计划资助项目（2013CB228106）

Characteristics of pollutant emissions from co-combustion of straw and coal in fluidized bed

  • 1.

    School of Energy and Environment, Southeast University, Nanjing 210096, China

  • Fund Project:

  • 摘要: 在自主设计的流化床上开展煤与稻秆混烧的实验。通过对燃烧过程中烟气成分及飞灰含碳量的分析，研究了质量掺混比、燃烧温度、流化风速及二次风率对混烧的影响。实验结果表明，掺混稻秆有效改善了煤的燃烧特性，随着质量掺混比的增加，NOx、SO2及CO的排放浓度降低，飞灰含碳量降低。当掺混比由0%增加至30%、温度为850 ℃时，NOx排放浓度由506.25 mg·m-3降低至404.33 mg·m-3，SO2排放浓度由762.86 mg·m-3降低至522.86 mg·m-3。随着燃烧温度的增加，NOx与SO2排放浓度增加，而CO排放浓度和飞灰含碳量降低。随着流化速度的增加，NOx与SO2排放浓度增加，CO排放浓度和飞灰含碳量先降低后增加，并分别在流化速度0.234 m·s-1和0.26 m·s-1时达到最低。随着二次风率的增加，SO2排放浓度与飞灰含碳量降低，NOx排放浓度与CO排放浓度先减小后增加，均在20%二次风率时达到最低。
    Abstract: Combustion experiments of coal and straw mixture were conducted in a lab designed fluidized bed. The effect of mixing ratio, bed temperature, fluidization velocity and secondary air ratio were studied by analyzing flue gas components and the carbon content in fly ash. The experimental results show that mixing straw can effectively improve the combustion characteristics of coal. With the increase of straw mass mixing ratio, the emission concentration of NOx, SO2 and CO decreases and the carbon content in fly ash decreases as well. In the condition of bed temperature at 850 ℃, when the mixing ratio were increased from 0% to 30%, the emission of NOx reduced from 506.25 mg·m-3 to 404.33 mg·m-3 and the emission of SO2 reduced from 762.86 mg·m-3 to 522.86 mg·m-3. As the combustion temperature increased, the concentration of NOx and SO2 increased, while the CO emission concentration and fly ash content decreased. With the increase of fluidization velocity, NOx and SO2 emission concentration increased, CO emission concentration and fly ash carbon content decreased first and then increased, and reached the lowest when the fluidization velocity was 0.234 m·s-1 and 0.26 m·s-1. With the increase of the secondary air ratio, the emission of SO2 and the carbon content of fly ash decreased, the emission of NOx and CO first declined and then increased, and reached the lowest at 20% secondary air ratio.
  • 加载中
  • [1] 马文超, 陈冠益, 颜蓓蓓,等. 生物质燃烧技术综述[J]. 生物质化学工程, 2007, 41(1):43-48
    [2] ELDENSTEN L, KUCINSKI A, EL-DORGHAMY A, et al.Introduction of co-combustion of coal and biomass in a 315 MW CFB boiler[J].International Waste Management and Landfill Symposium, 2005, 4(6):18-25
    [3] 刘豪, 邱建荣, 吴昊,等. 生物质和煤混合燃烧污染物排放特性研究[J]. 环境科学学报, 2002, 22(4):484-488
    [4] PROMPUBESS C, MEKASUT L, PIUMSOMBOON P, et al.Co-combustion of coal and biomass in a circulating fluidized bed combustor[J].Korean Journal of Chemical Engineering, 2007, 24(6):989-995. 10.1007/s11814-007-0109-4
    [5] SONG Q.Numerical simulation and combustion analysis of biomass gas and coal co-firing process[J].Journal of Henan Science & Technology, 2016, 12(4): 227-236
    [6] 马爱玲, 谌伦建, 黄光许,等. 生物质与煤混烧的热重-红外实验研究[J]. 煤炭学报, 2011, 36(1):124-128
    [7] MADHIYANON T, SATHITRUANGSAK P, SOPONRONNARIT S.Co-combustion of rice husk with coal in a cyclonic fluidized-bed combustor (ψ-FBC)[J].Fuel, 2009, 88(1):132-138 10.1016/j.fuel.2008.08.008
    [8] SHEN B X, YAO Q, LIU D C.Emission of N2O and NOx by co-combustion of biomass and coal in fluidized bed boiler[J].Power System Engineering, 2002, 12(8):124-132
    [9] LU W Q, FANG D Y, YANG Z Y.Study on burnout and SO2 emission characteristics during co-combustion of petroleum coke and oil shale in a fluidized bed[J].Applied Mechanics & Materials, 2011, 55-57:1547-1553 10.4028/www.scientific.net/AMM.55-57.1547
    [10] 罗娟, 侯书林, 赵立欣, 等. 典型生物质颗粒燃料燃烧特性实验[J]. 农业工程学报, 2010,26(5)：220-226
    [11] ZHOU W, ZHAO C S, DUAN L B, et al.Two-dimensional computational fluid dynamics simulation of coal combustion in a circulating fluidized bed combustor[J].Chemical Engineering Journal, 2011, 166(1):306-314 10.1016/j.cej.2010.09.048
    [12] PATIL D J, SMIT J, VAN S A M, et al.Wall-to-bed heat transfer in gas-solid bubbling fluidized beds[J].AIChE Journal, 2010, 52(1):58-74 10.1002/aic.10590
    [13] FU W, ZHANG Y, HAN H, et al.A general model of pulverized coal devolatilization[J].Fuel, 1989, 68(4):505-510 10.1016/0016-2361(89)90274-3
    [14] GUNGOR A.Two-dimensional biomass combustion modeling of CFB[J].Fuel, 2008, 87(8/9):1453-1468 10.1016/j.fuel.2007.08.013
    [15] GOYAL A, REHMAT A.Modeling of a fluidized-bed coal carbonizer[J].Industrial & Engineering Chemistry Research, 1993, 32(7):1396-1410 10.1021/ie00019a014
    [16] 胡满银, 乔欢, 杜欣, 等. 烟气再循环对炉内氮氧化物生成影响的数值模拟[J]. 华北电力大学学报(自然科学版),2007,34(6):77-82
    [17] FRYDA L, SOBRINO C, CIEPLIK M, et al.Study on ash deposition under oxyfuel combustion of coal/biomass blends [J].Fuel, 2010, 89(8):1889-1902 10.1016/j.fuel.2009.11.022
    [18] WANG X, SI J, TAN H, et al.Kinetics investigation on the reduction of NO using straw char based on physicochemical characterization[J].Bioresource Technology, 2011, 102(16):7401-7409 10.1016/j.biortech.2011.05.038
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  2323
  • HTML全文浏览数:  2181
  • PDF下载数:  145
  • 施引文献:  0
出版历程
  • 刊出日期:  2018-09-20

流化床中煤与稻秆混烧污染物排放特性

  • 1. 东南大学能源与环境学院，南京 210096
基金项目:

国家自然科学基金资助项目（51276040，U1361115）

国家重点基础研究发展计划资助项目（2013CB228106）

摘要: 在自主设计的流化床上开展煤与稻秆混烧的实验。通过对燃烧过程中烟气成分及飞灰含碳量的分析，研究了质量掺混比、燃烧温度、流化风速及二次风率对混烧的影响。实验结果表明，掺混稻秆有效改善了煤的燃烧特性，随着质量掺混比的增加，NOx、SO2及CO的排放浓度降低，飞灰含碳量降低。当掺混比由0%增加至30%、温度为850 ℃时，NOx排放浓度由506.25 mg·m-3降低至404.33 mg·m-3，SO2排放浓度由762.86 mg·m-3降低至522.86 mg·m-3。随着燃烧温度的增加，NOx与SO2排放浓度增加，而CO排放浓度和飞灰含碳量降低。随着流化速度的增加，NOx与SO2排放浓度增加，CO排放浓度和飞灰含碳量先降低后增加，并分别在流化速度0.234 m·s-1和0.26 m·s-1时达到最低。随着二次风率的增加，SO2排放浓度与飞灰含碳量降低，NOx排放浓度与CO排放浓度先减小后增加，均在20%二次风率时达到最低。

English Abstract

参考文献 (18)

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心